Hello people, I am getting a Mac for the first time! I've been using Dell&HP 17'' laptops all the time, so downgrading to 15'' screen size is not a big deal, because I'll output to a 22'' screen, when needed. Im an architect, I use ArchiCAD, AutoCAD and Maxwell. I am not a heavy user of Maxwell for rendering. I am thinking to go with refurbished Macbook Pro Retina. But should I go with the Early 2013, or Late 2013 models? I am confused because I cant find a right answer, I've heard many opinions, some saying Hasewell is good/bad, Iris 5200 is good/bad, etc. So this new Macbook Pro Retina, will be my machine for next 2 years(maybe 3). So here are specs of my choices- Early 2013 (February) 2.4Ghz i7 3630QM / 8GB ram/ GT 650M 1GB OR Late 2013 (October) 2.0Ghz i7 4750HQ / 8GB ram/ Iris Pro 5200 ...Or should I go with the (June 2012) 2.6 i7 3720QM/ 8GB ram/ GT 650M Thank you!